Phosgenite and Watermelon Tourmaline Optical Properties

Phosgenite

Watermelon Tourmaline

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1 Optical Properties

1.1 Luster

Adamantine

Vitreous

1.2 Pleochroism

Weakly pleochroic with O reddish and E greenish in thick sections.

Not Available

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

TransparentGemdat.org, Management Team (2012)

1.5 Refractive Index

2.117-2.1451.614-1.666

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Not Available

1.8 Birefringence

0.0270.014-0.040

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

TransparentGemdat.org

Phosgenite and Watermelon Tourmaline Optic Character

Phosgenite and Watermelon Tourmaline optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Phosgenite and Watermelon Tourmaline Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Phosgenite and Watermelon Tourmaline optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

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Phosgenite and Watermelon Tourmaline Transparency

Similar to their colors, Phosgenite and Watermelon Tourmaline transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Phosgenite is Gemmological Tables (2004) More from other references while Phosgenite is Gemmological Tables (2004) More from other references in appearance.